<template>
    <div>
        <!--面包屑导航区域  -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
  <el-breadcrumb-item>添加商品</el-breadcrumb-item>
</el-breadcrumb>
<!-- 卡片视图 -->
<el-card>
    <!-- 提示区域 -->
     <el-alert
    title="添加商品信息"
    type="info"
    center
    show-icon
    :closable="false">
  </el-alert>
  <!--步骤条区域-->
  <el-steps :active="activeIndex-0" align-center :space="200" finish-status="success">
  <el-step title="基本信息" ></el-step>
  <el-step title="商品参数" ></el-step>
  <el-step title="商品属性" ></el-step>
  <el-step title="商品图片" ></el-step>
  <el-step title="完成" ></el-step>
  
</el-steps>
<!-- tab栏区域 -->
<el-form :model="addForm" :rules="addFormRules"
ref="addFormRef" label-width="100px" label-position="top">
  <el-tabs :tab-position="'left'" 
  v-model="activeIndex" :before-leave="beforeTabLeave"
  @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
        <el-input v-model="addForm.goods_name">
        </el-input>
        </el-form-item>
           <el-form-item label="商品价格 " prop="goods_price">
        <el-input v-model="addForm.goods_price" type="number">
        </el-input>
        </el-form-item>
           <el-form-item label="商品重量" prop="goods_weight">
        <el-input v-model="addForm.goods_weight" type="number">
        </el-input>
        </el-form-item>
           <el-form-item label="商品数量" prop="goods_number">
        <el-input v-model="addForm.goods_number" type="number">
        </el-input> 
        </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
        <el-cascader 
    v-model="addForm.goods_cat" :props="cateProps"
    :options="catelist"
    @change="handleChange"></el-cascader>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">
        <!-- 渲染表单的item项 -->
        <el-form-item :label="item.attr_name" v-for="item in manyTableData"
        :key="item.attr_id">
        <!-- 复选框组 -->
         <el-checkbox-group v-model="item.attr_vals">
    <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>

  </el-checkbox-group>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" nqme="2">
        <el-form-item :label="item.attr_name"
         v-for="item in onlyTableData" :key="item.attr_id">
         <el-input v-model="item.attr_vals">
         </el-input>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
        <!-- action表示 图片要上传到后台的API地址 -->
        <el-upload
  :action="uploadURL"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  list-type="picture" :headers="headerObj" :on-success="handleSuccess">
  <el-button size="small" type="primary">点击上传</el-button>
  
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
        <!-- 富文本编辑器组件 -->
        <quill-editor v-model="addForm.goods_introduce">
        </quill-editor>
        <!--添加商品的按钮 -->
        <el-button type="primary" class="btnAdd" @click="add">
            添加商品
        </el-button>
    </el-tab-pane>

  </el-tabs>
</el-form>
</el-card>

<!-- 图片预览 -->
<el-dialog title="图片预览" :visible.sync="previewVisible"
 width="50%">
 <img :src="previewPath" alt="" class="previewImg"> 
</el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
export default {

    data(){
        return{
            activeIndex:'0',
            // 添加商品的表单数据对象
            addForm:{
               goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                // 商品所属的分类数组
                goods_cat:[],
                // 图片的数组
                pics:[],
                goods_introduce:'',
                attrs:[]

            },
            addFormRules:{
               goods_name:[{
                   required:true,message:'请输入商品名称',
                   trigger:'blur'
               },
            ]  ,
              goods_price:[{
                    required:true,message:'请输入商品价格',
                   trigger:'blur'
              }],
              goods_weight:[{
                  required:true,message:'请输入商品重量',
                   trigger:'blur'
              }] ,
              goods_number:[{
                   required:true,message:'请输入商品数量',
                   trigger:'blur'
              }],
              goods_cat:[{
                  required:true,message:'请选择商品分类',
                   trigger:'blur'  
              }]
            },
            // 商品分类列表
            catelist:[],
            // 级联选择框配置对象
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children',
                  expandTrigger:'hover',
            
            },
            // 动态参数列表数据
            manyTableData:[],
            // 静态属性列表数据
            onlyTableData:[],
            // 上传图片的URL地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的headers请求头对象
            headerObj:{
Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:'',
            previewVisible:false

      
    


        
        }
    },
    created(){

this.getCateList()
    },
    methods:{
// 获取所有商品分类数据
async getCateList(){
    const {data:res}=await
    this.$http.get('categories')
    if(res.meta.status!==200){
        return this.$message.error('获取商品分类数据失败！')
    }
  this.catelist=res.data
  console.log(this.catelist);

},
// 级联选择器中选项变化，会触发这个函数
handleChange(){
if(this.addForm.goods_cat.length!==3){
    this.addForm.goods_cat=[]
}
},
// 阻止页签切换事件
beforeTabLeave(activeName,oldActiveName){
    if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
        this.$message.error('请先选择商品分类')
        return false
    }


},
// 添加tab点击事件
async tabClicked(){
if(this.activeIndex==='1'){
    const {data:res}=await this.$http.get(
        `categories/${this.cateId}/attributes`,{
            params:{sel:'many'}
        }
    )
    if(res.meta.status!==200){
        return this.$message.error('获取动态列表失败！')
    }
    console.log(res.data)
    res.data.forEach(item=>{
        item.attr_vals=item.attr_vals.length===0?[]:item.attr_vals.split(' ')
    })
    this.manyTableData=res.data
}
else if(this.activeIndex==='2'){
 const {data:res}=await this.$http.get(
        `categories/${this.cateId}/attributes`,{
            params:{sel:'only'}
        }
    )
    if(res.meta.status!==200){
        return this.$message.error('获取静态属性失败！')
    }
    
  
  console.log(res.data)
     this.onlyTableData=res.data 
}
},
// 将对attr_vals的操作，保存到数据库
async saveAttrVals(row){
    // 需要发起请求，保存这次操作
    const{data:res}=await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
            attr_name:row.attr_name,
            attr_sel:row.attr_sel,
            attr_vals:row.attr_vals.join(' ')
        }
    )
    if(res.meta.status!==200){
        return this.$message.error('修改参数项失败！')
    }
    this.$message.success('修改参数项成功！')
},
// 处理图片预览效果
handlePreview(file){
console.log(file);
this.previewPath=file.response.data.url
this.previewVisible=true
},
// 处理移出图片的操作
handleRemove(file){
// 1、获取将要删除的图片的临时路径
const filePath=file.response.data.tmp_path
// 2、从pics数组中，找到这个图片对应的索引值
const i=this.addForm.pics.findIndex(x=>x.pic===filePath)
// 3、调用数组的splice方法，把图片信息对象，从pics数组中移除
this.addForm.pics.splice(i,1)
},
// 监听图片上传成功的事件
handleSuccess(response){
    // 1、拼接得到一个图片信息对象
    const picInfo={pic:response.data.tmp_path}
    // 2、将图片信息对象，push到pics数组中 
this.addForm.pics.push(picInfo)

},
// 添加商品
add(){
    this.$refs.addFormRef.validate(async valid=>{
        if(!valid){
            return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        const form=_.cloneDeep(this.addForm)

        form.goods_cat=form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item=>{
            const newInfo={
                attr_id:item.attr_id,
                attr_value:item.attr_vals.join(' ')

            }
            this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item=>{
            const newInfo={
                attr_id:item.attr_id,
                attr_value:item.attr_vals
            }
              this.addForm.attrs.push(newInfo)
        })
        form.attrs=this.addForm.attrs
        // 发起请求添加商品
        // 商品的名称，必须是唯一的
        const {data:res}=await this.$http.post('goods',form)
        if(res.meta.status!==201){
            return this.$message.error('添加商品失败！')

        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
    })
}
    
    
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>
<style lang="less" scoped>
.el-checkbox{
    margin:0 10px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>